I have just updated to v1.80 of PMS and I still am having issues with playing m2ts files directly with the TV, (MKV etc work fine). The same m2ts files work OK when streamed via a PS3 and xBox360. Is there a configuration files that needs updating? I have never done this so any details of what and how would be most useful..

I've answered my own question with a bit more trial and error. Under Common Transcode settings > Misc Options > Skip transcode for the following extensions (comma separated): I placed "m2ts,wmv". Now both these troublesome file types work fine.. Simple it seems!